package util;

/**
 * Created by Administrator on 2016/12/28 0028.
 */
import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.filter.OncePerRequestFilter;

public class SessionFilter extends OncePerRequestFilter {

    @Override
    protected void doFilterInternal(HttpServletRequest request,
                                    HttpServletResponse response, FilterChain filterChain)
            throws ServletException, IOException {
        // 不过滤的uri
        String[] notFilter = new String[] { "/js",".jpg",".png",".gif", "/css", "/img","/register","/login","/toLogin","/saveRegister","/frontEndIndex","/productDetails","/addCollection","/orderConfirm","/personal","/captcha_send","/checkLogin","/mobileTerminal"};
        // 请求的uri
        String uri = request.getRequestURI();
        // uri中包含background时才进行过滤
        if (uri.indexOf("/") != -1) {
            // 是否过滤
            boolean doFilter = true;
            for (String s : notFilter) {
                if (uri.indexOf(s) != -1) {
                    // 如果uri中包含不过滤的uri，则不进行过滤
                    doFilter = false;
                    break;
                }
            }
            if (doFilter) {
                // 执行过滤
                // 从session中获取登录者实体
                Object obj = request.getSession().getAttribute("userName");
                Object phone = request.getSession().getAttribute("phone");
                if (null == obj && phone==null) {
                    // 如果session中不存在登录者实体，则弹出框提示重新登录
                    // 设置request和response的字符集，防止乱码
                    request.setCharacterEncoding("UTF-8");
                    response.setCharacterEncoding("UTF-8");

                    request.getRequestDispatcher("/").forward(request,response);
                } else {
                    // 如果session中存在登录者实体，则继续
                    filterChain.doFilter(request, response);
                }
            } else {
                // 如果不执行过滤，则继续
                filterChain.doFilter(request, response);
            }
        } else {
            // 如果uri中不包含do，则继续
            filterChain.doFilter(request, response);
        }
    }
}